CAIE IGCSE Physics 3.2.4.3 Recall That Visible Light of a Single Questions
Practise recognising monochromatic visible light as one frequency, whether in definitions, laser contexts or prism comparisons.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- State that monochromatic light has a single frequency, distinguish it from amplitude, speed or brightness, and predict refraction without spectral splitting in a prism.
CAIE IGCSE Physics 3.2.4.3 Recall That Visible Light of a Single Questions question 1
Fig. 5.1 shows a block ABCD made of glass that has a refractive index of 1.5. The block has one curved side AB and three straight sides, BC, CD and DA.
Fig. 5.1
There are right angles at C and D. The curved side AB is one quarter of the circumference of a circle that has its centre at point P.
A ray of monochromatic light enters the block through the curved side AB and strikes side BC at P. Some light emerges into the air and some is reflected.
State what is meant by monochromatic.
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